21331030332 has 12 divisors (see below), whose sum is σ = 49772404136. Its totient is φ = 7110343440.

The previous prime is 21331030307. The next prime is 21331030349. The reversal of 21331030332 is 23303013312.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 21331030299 and 21331030308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 888792919 + ... + 888792942.

Almost surely, 2^21331030332 is an apocalyptic number.

It is an amenable number.

21331030332 is an abundant number, since it is smaller than the sum of its proper divisors (28441373804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21331030332 is a wasteful number, since it uses less digits than its factorization.

21331030332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777585868 (or 1777585866 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21331030332 its reverse (23303013312), we get a palindrome (44634043644).

The spelling of 21331030332 in words is "twenty-one billion, three hundred thirty-one million, thirty thousand, three hundred thirty-two".